/*      display.c               Larn is copyrighted 1986 by Noah Morgan. */
/* $FreeBSD: src/games/larn/display.c,v 1.4 1999/11/16 02:57:21 billf Exp $ */
#include "header.h"
#define makecode(_a,_b,_c) (((_a)<<16) + ((_b)<<8) + (_c))

static void bot_hpx(void);
static void bot_spellx(void);
static void botside(void);
static void botsub(int, const char *);
static void seepage(void);

static int minx, maxx, miny, maxy, k, m;
static char bot1f = 0, bot2f = 0, bot3f = 0;
char always = 0;
/*
        bottomline()

        now for the bottom line of the display
 */
void
bottomline(void)
{
        recalc();
        bot1f = 1;
}

void
bottomhp(void)
{
        bot2f = 1;
}

void
bottomspell(void)
{
        bot3f = 1;
}

void
bottomdo(void)
{
        if (bot1f) {
                bot3f = bot1f = bot2f = 0;
                bot_linex();
                return;
        }
        if (bot2f) {
                bot2f = 0;
                bot_hpx();
        }
        if (bot3f) {
                bot3f = 0;
                bot_spellx();
        }
}

void
bot_linex(void)
{
        int i;
        if (cbak[SPELLS] <= -50 || (always)) {
                cursor(1, 18);
                if (c[SPELLMAX] > 99)
                        lprintf("Spells:%3d(%3d)", (long)c[SPELLS], (long)c[SPELLMAX]);
                else
                        lprintf("Spells:%3d(%2d) ", (long)c[SPELLS], (long)c[SPELLMAX]);
                lprintf(" AC: %-3d  WC: %-3d  Level", (long)c[AC], (long)c[WCLASS]);
                if (c[LEVEL] > 99)
                        lprintf("%3d", (long)c[LEVEL]);
                else
                        lprintf(" %-2d", (long)c[LEVEL]);
                lprintf(" Exp: %-9d %s\n", (long)c[EXPERIENCE], class[c[LEVEL] - 1]);
                lprintf("HP: %3d(%3d) STR=%-2d INT=%-2d ",
                        (long)c[HP], (long)c[HPMAX], (long)(c[STRENGTH] + c[STREXTRA]), (long)c[INTELLIGENCE]);
                lprintf("WIS=%-2d CON=%-2d DEX=%-2d CHA=%-2d LV:",
                        (long)c[WISDOM], (long)c[CONSTITUTION], (long)c[DEXTERITY], (long)c[CHARISMA]);

                if ((level == 0) || (wizard))
                        c[TELEFLAG] = 0;
                if (c[TELEFLAG])
                        lprcat(" ?");
                else
                        lprcat(levelname[(int)level]);
                lprintf("  Gold: %-6d", (long)c[GOLD]);
                always = 1;
                botside();
                c[TMP] = c[STRENGTH] + c[STREXTRA];
                for (i = 0; i < 100; i++)
                        cbak[i] = c[i];
                return;
        }
        botsub(makecode(SPELLS, 8, 18), "%3d");
        if (c[SPELLMAX] > 99)
                botsub(makecode(SPELLMAX, 12, 18), "%3d)");
        else
                botsub(makecode(SPELLMAX, 12, 18), "%2d) ");
        botsub(makecode(HP, 5, 19), "%3d");
        botsub(makecode(HPMAX, 9, 19), "%3d");
        botsub(makecode(AC, 21, 18), "%-3d");
        botsub(makecode(WCLASS, 30, 18), "%-3d");
        botsub(makecode(EXPERIENCE, 49, 18), "%-9d");
        if (c[LEVEL] != cbak[LEVEL]) {
                cursor(59, 18);
                lprcat(class[c[LEVEL] - 1]);
        }
        if (c[LEVEL] > 99)
                botsub(makecode(LEVEL, 40, 18), "%3d");
        else
                botsub(makecode(LEVEL, 40, 18), " %-2d");
        c[TMP] = c[STRENGTH] + c[STREXTRA];
        botsub(makecode(TMP, 18, 19), "%-2d");
        botsub(makecode(INTELLIGENCE, 25, 19), "%-2d");
        botsub(makecode(WISDOM, 32, 19), "%-2d");
        botsub(makecode(CONSTITUTION, 39, 19), "%-2d");
        botsub(makecode(DEXTERITY, 46, 19), "%-2d");
        botsub(makecode(CHARISMA, 53, 19), "%-2d");
        if ((level != cbak[CAVELEVEL]) || (c[TELEFLAG] != cbak[TELEFLAG])) {
                if ((level == 0) || (wizard))
                        c[TELEFLAG] = 0;
                cbak[TELEFLAG] = c[TELEFLAG];
                cbak[CAVELEVEL] = level;
                cursor(59, 19);
                if (c[TELEFLAG])
                        lprcat(" ?");
                else
                        lprcat(levelname[(int)level]);
        }
        botsub(makecode(GOLD, 69, 19), "%-6d");
        botside();
}

/*
        special subroutine to update only the gold number on the bottomlines
        called from ogold()
 */
void
bottomgold(void)
{
        botsub(makecode(GOLD, 69, 19), "%-6d");
}

/*
        special routine to update hp and level fields on bottom lines
        called in monster.c hitplayer() and spattack()
 */
static void
bot_hpx(void)
{
        if (c[EXPERIENCE] != cbak[EXPERIENCE]) {
                recalc();
                bot_linex();
        } else
                botsub(makecode(HP, 5, 19), "%3d");
}

/*
        special routine to update number of spells called from regen()
 */
static void
bot_spellx(void)
{
        botsub(makecode(SPELLS, 9, 18), "%2d");
}

/*
        common subroutine for a more economical bottomline()
 */
static struct bot_side_def {
        int typ;
        const char *string;
} bot_data[] =
{
        { STEALTH, "stealth" },
        { UNDEADPRO, "undead pro" },
        { SPIRITPRO, "spirit pro" },
        { CHARMCOUNT, "Charm" },
        { TIMESTOP, "Time Stop" },
        { HOLDMONST, "Hold Monst" },
        { GIANTSTR, "Giant Str" },
        { FIRERESISTANCE, "Fire Resit" },
        { DEXCOUNT, "Dexterity" },
        { STRCOUNT, "Strength" },
        { SCAREMONST, "Scare" },
        { HASTESELF, "Haste Self" },
        { CANCELLATION, "Cancel" },
        { INVISIBILITY, "Invisible" },
        { ALTPRO, "Protect 3" },
        { PROTECTIONTIME, "Protect 2" },
        { WTW, "Wall-Walk" }
};

static void
botside(void)
{
        int i, idx;
        for (i = 0; i < 17; i++) {
                idx = bot_data[i].typ;
                if ((always) || (c[idx] != cbak[idx])) {
                        if ((always) || (cbak[idx] == 0)) {
                                if (c[idx]) {
                                        cursor(70, i + 1);
                                        lprcat(bot_data[i].string);
                                }
                        } else if (c[idx] == 0) {
                                cursor(70, i + 1);
                                lprcat("          ");
                        }
                        cbak[idx] = c[idx];
                }
        }
        always = 0;
}

static void
botsub(int idx, const char *str)
{
        int x, y;
        y = idx & 0xff;
        x = (idx >> 8) & 0xff;
        idx >>= 16;
        if (c[idx] != cbak[idx]) {
                cbak[idx] = c[idx];
                cursor(x, y);
                lprintf(str, (long)c[idx]);
        }
}

/*
 *      subroutine to draw only a section of the screen
 *      only the top section of the screen is updated.
 *      If entire lines are being drawn, then they will be cleared first.
 */
/* for limited screen drawing */
int d_xmin = 0, d_xmax = MAXX, d_ymin = 0, d_ymax = MAXY;

void
draws(int xmin, int xmax, int ymin, int ymax)
{
        int i, idx;
        /* clear section of screen as needed */
        if (xmin == 0 && xmax == MAXX) {
                if (ymin == 0)
                        cl_up(79, ymax);
                else
                        for (i = ymin; i < ymin; i++)
                                cl_line(1, i + 1);
                xmin = -1;
        }
        d_xmin = xmin;  /* for limited screen drawing */
        d_xmax = xmax;
        d_ymin = ymin;
        d_ymax = ymax;
        drawscreen();
        /* draw stuff on right side of screen as needed */
        if (xmin <= 0 && xmax == MAXX) {
                for (i = ymin; i < ymax; i++) {
                        idx = bot_data[i].typ;
                        if (c[idx]) {
                                cursor(70, i + 1);
                                lprcat(bot_data[i].string);
                        }
                        cbak[idx] = c[idx];
                }
        }
}

/*
        drawscreen()

        subroutine to redraw the whole screen as the player knows it
 */
char screen[MAXX][MAXY], d_flag;        /* template for the screen */

void
drawscreen(void)
{
        int i, j, l;
        int lastx, lasty;       /* variables used to optimize the object printing */
        if (d_xmin == 0 && d_xmax == MAXX && d_ymin == 0 && d_ymax == MAXY) {
                d_flag = 1;
                clear();        /* clear the screen */
        } else {
                d_flag = 0;
                cursor(1, 1);
        }
        /* d_xmin=-1 means display all without bottomline */
        if (d_xmin < 0)
                d_xmin = 0;

        for (i = d_ymin; i < d_ymax; i++)
                for (j = d_xmin; j < d_xmax; j++)
                        if (know[j][i] == 0)
                                screen[j][i] = ' ';
                        else if ((l = mitem[j][i]) != 0)
                                screen[j][i] = monstnamelist[l];
                        else if ((l = item[j][i]) == OWALL)
                                screen[j][i] = '#';
                        else
                                screen[j][i] = ' ';

        for (i = d_ymin; i < d_ymax; i++) {
                j = d_xmin;
                while ((j < d_xmax) && (screen[j][i] == ' '))
                        j++;
                /* was m=0 */
                if (j >= d_xmax)        /* don't search backwards if blank line */
                        m = d_xmin;
                else {          /* search backwards for end of line */
                        m = d_xmax - 1;
                        while ((screen[m][i] == ' ') && (m > d_xmin))
                                --m;
                        if (j <= m)
                                cursor(j + 1, i + 1);
                        else
                                continue;
                }
                while (j <= m) {
                        if (j <= m - 3) {
                                for (l = j; l <= j + 3; l++)
                                        if (screen[l][i] != ' ')
                                                l = 1000;
                                if (l < 1000) {
                                        while (j <= m && screen[j][i] == ' ')
                                                j++;
                                        cursor(j + 1, i + 1);
                                }
                        }
                        lprc(screen[j++][i]);
                }
        }
        setbold();              /* print out only bold objects now */

        for (lastx = lasty = 127, i = d_ymin; i < d_ymax; i++)
                for (j = d_xmin; j < d_xmax; j++) {
                        if ((l = item[j][i]) != 0)
                                if (l != OWALL)
                                        if ((know[j][i]) && (mitem[j][i] == 0))
                                                if (objnamelist[l] != ' ') {
                                                        if (lasty != i + 1 || lastx != j)
                                                                cursor(lastx = j + 1, lasty = i + 1);
                                                        else
                                                                lastx++;
                                                        lprc(objnamelist[l]);
                                                }
                }


        resetbold();
        if (d_flag) {
                always = 1;
                botside();
                always = 1;
                bot_linex();
        }
        oldx = 99;
        d_xmin = 0, d_xmax = MAXX, d_ymin = 0, d_ymax = MAXY;   /* for limited screen drawing */
}

/*
        showcell(x,y)

        subroutine to display a cell location on the screen
 */
void
showcell(int x, int y)
{
        int i, j, l, n;
        if (c[BLINDCOUNT])      /* see nothing if blind */
                return;
        if (c[AWARENESS]) {
                minx = x - 3;
                maxx = x + 3;
                miny = y - 3;
                maxy = y + 3;
        } else {
                minx = x - 1;
                maxx = x + 1;
                miny = y - 1;
                maxy = y + 1;
        }

        if (minx < 0)
                minx = 0;
        if (maxx > MAXX - 1)
                maxx = MAXX - 1;
        if (miny < 0)
                miny = 0;
        if (maxy > MAXY - 1)
                maxy = MAXY - 1;

        for (j = miny; j <= maxy; j++)
                for (n = minx; n <= maxx; n++)
                        if (know[n][j] == 0) {
                                cursor(n + 1, j + 1);
                                x = maxx;
                                while (know[x][j])
                                        --x;
                                for (i = n; i <= x; i++) {
                                        if ((l = mitem[i][j]) != 0)
                                                lprc(monstnamelist[l]);
                                        else
                                                switch (l = item[i][j]) {
                                                case OWALL:
                                                case 0:
                                                case OIVTELETRAP:
                                                case OTRAPARROWIV:
                                                case OIVDARTRAP:
                                                case OIVTRAPDOOR:
                                                        lprc(objnamelist[l]);
                                                        break;

                                                default:
                                                        setbold();
                                                        lprc(objnamelist[l]);
                                                        resetbold();
                                                }
                                        know[i][j] = 1;
                                }
                                n = maxx;
                        }
}

/*
        this routine shows only the spot that is given it.  the spaces around
        these coordinated are not shown
        used in godirect() in monster.c for missile weapons display
 */
void
show1cell(int x, int y)
{
        if (c[BLINDCOUNT])      /* see nothing if blind */
                return;
        cursor(x + 1, y + 1);
        if ((k = mitem[x][y]) != 0)
                lprc(monstnamelist[k]);
        else
                switch (k = item[x][y]) {
                case OWALL:
                case 0:
                case OIVTELETRAP:
                case OTRAPARROWIV:
                case OIVDARTRAP:
                case OIVTRAPDOOR:
                        lprc(objnamelist[k]);
                        break;

                default:
                        setbold();
                        lprc(objnamelist[k]);
                        resetbold();
                }
        know[x][y] |= 1;        /* we end up knowing about it */
}

/*
        showplayer()

        subroutine to show where the player is on the screen
        cursor values start from 1 up
 */
void
showplayer(void)
{
        cursor(playerx + 1, playery + 1);
        oldx = playerx;
        oldy = playery;
}

/*
        moveplayer(dir)

        subroutine to move the player from one room to another
        returns 0 if can't move in that direction or hit a monster or on an object
        else returns 1
        nomove is set to 1 to stop the next move (inadvertent monsters hitting
        players when walking into walls) if player walks off screen or into wall
 */
short diroffx[] = { 0,  0, 1,  0, -1,  1, -1, 1, -1 };
short diroffy[] = { 0,  1, 0, -1,  0, -1, -1, 1,  1 };

/*
 * from = present room #  direction = [1-north]
 * [2-east] [3-south] [4-west] [5-northeast]
 * [6-northwest] [7-southeast] [8-southwest]
 * if direction=0, don't move--just show where he is
 */
int
moveplayer(int dir)
{
        int l, n, i, j;
        if (c[CONFUSE])         /*if confused any dir */
                if (c[LEVEL] < rnd(30))
                        dir = rund(9);
        l = playerx + diroffx[dir];
        n = playery + diroffy[dir];
        if (l < 0 || l >= MAXX || n < 0 || n >= MAXY) {
                nomove = 1;
                return (yrepcount = 0);
        }
        i = item[l][n];
        j = mitem[l][n];
        /* hit a wall */
        if (i == OWALL && c[WTW] == 0) {
                nomove = 1;
                return (yrepcount = 0);
        }
        if (l == 33 && n == MAXY - 1 && level == 1) {
                newcavelevel(0);
                for (l = 0; l < MAXX; l++)
                        for (n = 0; n < MAXY; n++)
                                if (item[l][n] == OENTRANCE) {
                                        playerx = l;
                                        playery = n;
                                        positionplayer();
                                        drawscreen();
                                        return (0);
                                }
        }
        /* hit a monster*/
        if (j > 0) {
                hitmonster(l, n);
                return (yrepcount = 0);
        }
        lastpx = playerx;
        lastpy = playery;
        playerx = l;
        playery = n;
        if (i && i != OTRAPARROWIV && i != OIVTELETRAP && i != OIVDARTRAP && i != OIVTRAPDOOR)
                return (yrepcount = 0);
        else
                return (1);
}

/*
 *      function to show what magic items have been discovered thus far
 *      enter with -1 for just spells, anything else will give scrolls & potions
 */
static int lincount, count;

void
seemagic(int arg)
{
        int i, number = 0;
        count = lincount = 0;
        nosignal = 1;

        if (arg == -1) {        /* if display spells while casting one */
                for (number = i = 0; i < SPNUM; i++)
                        if (spelknow[i])
                                number++;
                number = (number + 2) / 3 + 4;  /* # lines needed to display */
                cl_up(79, number);
                cursor(1, 1);
        } else {
                resetscroll();
                clear();
        }

        lprcat("The magic spells you have discovered thus far:\n\n");
        for (i = 0; i < SPNUM; i++)
                if (spelknow[i]) {
                        lprintf("%s %-20s ", spelcode[i], spelname[i]);
                        seepage();
                }

        if (arg == -1) {
                seepage();
                more();
                nosignal = 0;
                draws(0, MAXX, 0, number);
                return;
        }

        lincount += 3;
        if (count != 0) {
                count = 2;
                seepage();
        }

        lprcat("\nThe magic scrolls you have found to date are:\n\n");
        count = 0;
        for (i = 0; i < MAXSCROLL; i++)
                if (scrollname[i][0])
                        if (scrollname[i][1] != ' ') {
                                lprintf("%-26s", &scrollname[i][1]);
                                seepage();
                        }

        lincount += 3;
        if (count != 0) {
                count = 2;
                seepage();
        }

        lprcat("\nThe magic potions you have found to date are:\n\n");
        count = 0;
        for (i = 0; i < MAXPOTION; i++)
                if (potionname[i][0])
                        if (potionname[i][1] != ' ') {
                                lprintf("%-26s", &potionname[i][1]);
                                seepage();
                        }

        if (lincount != 0)
                more();
        nosignal = 0;
        setscroll();
        drawscreen();
}

/*
 *      subroutine to paginate the seemagic function
 */
static void
seepage(void)
{
        if (++count == 3) {
                lincount++;
                count = 0;
                lprc('\n');
                if (lincount > 17) {
                        lincount = 0;
                        more();
                        clear();
                }
        }
}